Question

Prelaboratory Assignment: An Introduction to Calorimetry 1. The metabolism of one mole of glycerol trioleate, Cs H3O, a common fat, produces 3.022 x 10 kJ of heat. How many grams of the fat must be burned to raise the temperature of 50 g of water from 25.0°C to 30.0°C? 2. A metal sample having a temperature of 100°C anda mass of 45.2 g was placed in 50 g of water with a temperature of 26°C. At equilibrium, the final temperature was 32.7°C a) How much heat flowed into the water? b) What is the heat capacity of the metal? 3. When 2.0 g of NaOH are dissolved in 49.0 g of water, the temperature increased 10.5°C What is the heat of dissolution of NaOH expressed in Joules per mole? 4. The heat capacity of copper is 0.382 J/g.C. A 22.6 g sample of copper at 93° C is placed in 50 g of water at 23.9° Č. What is the final temperature of the system?

Answer 1

Date II Page Imole of (si Hayo = 801 sind. a water = mxux de - a= heat / Energy 9 - So gx4:18 J (o-ist Co - $q cilic heos dt = change in temperature. Up2 4.18 ] ( for water). 4. So, x 41 px; a - To4, т 1 мм 5. На о, 3.022 хоч Г x me u o 45 Г x= 0.0345 mole .. mass of (s. Ha = mols & moleu mass = 0.0345 mod x 80ls - Эзз аман